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Business Segments and Foreign Operations (Summarized Information By Reportable Segments) (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Feb. 28, 2018
USD ($)
Feb. 28, 2017
USD ($)
Feb. 28, 2018
USD ($)
item
Feb. 28, 2017
USD ($)
Segment Reporting Information [Line Items]        
Number of reportable segments | item     3  
Net sales $ 101,256 $ 96,519 $ 198,853 $ 185,767
Income from operations 19,368 18,862 36,504 35,378
Depreciation and amortization expense 1,969 1,678 3,886 3,298
Interest income 131 133 264 280
Interest expense 1,002 598 1,843 1,129
Unallocated Corporate [Member]        
Segment Reporting Information [Line Items]        
Income from operations [1] (6,681) (6,760) (13,031) (13,157)
Depreciation and amortization expense [1] 196 10 388 18
Americas Segment [Member]        
Segment Reporting Information [Line Items]        
Net sales 44,967 45,078 91,130 87,918
Income from operations 10,336 10,710 21,366 21,459
Depreciation and amortization expense 1,046 1,090 2,140 2,139
Interest income   2 1 4
Interest expense 999 595 1,838 1,122
EMEA Segments [Member]        
Segment Reporting Information [Line Items]        
Net sales 39,632 36,205 74,660 66,462
Income from operations 10,532 10,327 18,368 17,505
Depreciation and amortization expense 646 517 1,205 1,018
Interest income 118 109 237 189
Asia-Pacific Segment [Member]        
Segment Reporting Information [Line Items]        
Net sales 16,657 15,236 33,063 31,387
Income from operations 5,181 4,585 9,801 9,571
Depreciation and amortization expense 81 61 153 123
Interest income 13 22 26 87
Interest expense $ 3 $ 3 $ 5 $ 7
[1] Unallocated corporate expenses are general corporate overhead expenses not directly attributable to any one of the operating segments. These expenses are reported separate from the Company's identified segments and are included in Selling, General and Administrative expenses on the Company's condensed consolidated statements of operations.